change default cols location in README.md and ignore binaries

.gitignore

@@ -0,0 +1,2 @@
+*.o
+dmenu

README.md

@@ -20,6 +20,6 @@ Make and install dmenu
 ```sh
 make install
 ```
-**Final step:** Add a colourscheme to `~/cols/dmenu.h`. This is where dmenu will read a colorscheme.<br>
+**Final step:** Add a colourscheme to `~/.config/cols/dmenu.h`. This is where dmenu will read a colorscheme.<br>
 This should be in the usual form dmenu would have a colourscheme in it's own source code, as `dmenu.h` is included at compile time.<br>
 Alternatively, you could change the location of the colourscheme in `config.h`.